The easiest way to get clear on the values of the coins made by both of Australia's Mints since 1966 is to check what similar coins are selling for on eBay.

eBay definitely isn't the only place such coins are sold, but it is the easiest site to use for research purposes.

Once you learn the process with your first coin, you can use the same process again and again for each different coin or set that you have.